Hey! I'm interested in the idea of pipelines and algorithms pushing people to extreme conclusions. In terms of "virtue signaling" if you're looking for definitive ways that companies or other firms do it, I would look to examine the profit margins and determine if there is a pattern between the PR campaigns and profit increase.
In terms of internet propaganda, it seems like no matter where you go you'll find the most extremes of ideologies. I feel like you might be able to explore why those extremes are continuing to pop up. I think you find that social media is now people's primary news source, if you lean into how the dissolution of information affects people's political and ideological views then you may find how the methods of propaganda work.
I can very easily relate to writing my introduction and conclusion before I've done the research. Good work with yours!